Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/49071
Título: | Novel functionalised imidazo-benzocrown ethers bearing a thiophene spacer as fluorimetric chemosensors for metal ion detection |
Autor(es): | Esteves, Cátia Isabel Canavezes Batista, Rosa Maria Ferreira Raposo, M. Manuela M. Costa, Susana P. G. |
Palavras-chave: | Phenylalanine Imidazo-benzocrown ether Thiophene Fluorescence Metal ion detection Aqueous solution |
Data: | Abr-2016 |
Editora: | Elsevier 1 |
Revista: | Dyes and Pigments |
Citação: | Dyes and Pigments, 2016, 135, 134-142 |
Resumo(s): | Novel phenylalanine derivatives bearing benzimidazole and crown ethers as coordinating/reporting units and thiophene as a spacer unit were synthesized for the first time, and their evaluation as fluorimetric chemosensors was carried out in acetonitrile and acetonitrile/water solutions. 15-Crown-5 benzimidazolyl phenylalanine methyl ester, 15-crown-5 thienylbenzimidazolyl phenylalanine methyl ester and 18-crown-6 thienylbenzimidazolyl phenylalanine methyl ester were tested for alkaline, alkaline-earth and transition metal ions (such as Na+, Ca2+, Cd2+, Co2+, Cr3+, Cu2+, Fe2+, Fe3+, Hg2+, Ni2+, Pd2+ and Zn2+). The different crown ether binding moieties as well as the electronic nature and the length of the π-bridge linked to the benzimidazole heterocycle allowed the fine tuning of the sensory properties as seen by spectrofluorimetric titrations. Therefore, 15-crown-5 benzimidazolyl phenylalanine methyl ester is a fluorimetric chemosensor, being selective and sensitive for Cu2+ and Pd2+ in aqueous solutions (ACN/H2O; 80:20). On the other hand, the metal cation sensing properties displayed by 15-crown-5 thienylbenzimidazolyl phenylalanine methyl ester bearing an arylthienyl spacer showed that this is a promising candidate as fluorimetric chemosensor for Fe3+, Pb2+ and Pd2+ in acetonitrile solution. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/49071 |
DOI: | 10.1016/j.dyepig.2016.04.037 |
ISSN: | 0143-7208 |
e-ISSN: | 1873-3743 |
Versão da editora: | https://doi.org/10.1016/j.dyepig.2016.04.037 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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artigo Esteves DYPI 2 2016.pdf | 1,66 MB | Adobe PDF | Ver/Abrir |